| MD | Players | Club | Nationality | DOB | A(D) |
|---|---|---|---|---|---|
| 02-Feb-2018 |  Jac Price | Scarlets | Wales | 04-Aug-2000 | 17(182) |
| 03-Nov-2017 |  Cameron Redpath | Sale Sharks | Scotland | 23-Dec-1999 | 17(316) |
| 04-Nov-2017 |  Aaron O'Sullivan | London Wasps | Ireland | 15-Dec-1999 | 17(325) |
| 27-Jan-2018 |  Rio Dyer | Gwent Dragons | Wales | 21-Dec-1999 | 18(38) |
| 27-Jan-2018 | Taju Atta | London Wasps | England | 30-Nov-1999 | 18(59) |
| 02-Feb-2018 | Dewi Cross | Ospreys | Wales | 06-Dec-1999 | 18(59) |
| 04-Feb-2018 |  Cameron Jordan | Leicester Tigers | England | 17-Nov-1999 | 18(80) |
| 27-Jan-2018 | Corey Baldwin | Scarlets | Wales | 13-Oct-1999 | 18(107) |
| 27-Jan-2018 | Sam Spink | London Wasps | England | 06-Oct-1999 | 18(114) |
| 27-Jan-2018 | Kieran Wilkinson | Sale Sharks | England | 03-Oct-1999 | 18(117) |
| 03-Nov-2017 | Arron Reed | Sale Sharks | England | 10-Jul-1999 | 18(117) |
| 02-Feb-2018 |  Ollie Lawrence | Worcester Warriors | England | 18-Sep-1999 | 18(138) |
| 27-Jan-2018 |  Oliver Morris | Saracens | England | 19-Aug-1999 | 18(162) |
| 27-Jan-2018 |  Corey Howells | Cardiff Blues | Wales | 16-Jul-1999 | 18(196) |
| 10-Nov-2017 | Tommy Reffell | Leicester Tigers | Wales | 27-Apr-1999 | 18(198) |
| 11-Nov-2017 |  Joshua Basham | London Irish | England | 17-Apr-1999 | 18(209) |
| 26-Jan-2018 | Cai Evans | Ospreys | Wales | 23-Jun-1999 | 18(218) |
| 03-Nov-2017 | Luke James | Sale Sharks | England | 18-Mar-1999 | 18(231) |
| 10-Nov-2017 | Thomas Hardwick | Leicester Tigers | England | 24-Mar-1999 | 18(232) |
| 04-Nov-2017 |  Tom Seabrook | Gloucester | England | 15-Feb-1999 | 18(263) |
| 04-Nov-2017 | Tom Willis | London Wasps | England | 18-Jan-1999 | 18(291) |
| 17-Nov-2017 | Tomi Lewis | Scarlets | Wales | 17-Jan-1999 | 18(305) |
| 26-Jan-2018 | Callum Carson | Ospreys | Wales | 13-Mar-1999 | 18(320) |
| 12-Nov-2017 | Tom Rogers | Scarlets | Wales | 17-Dec-1998 | 18(331) |
| 10-Nov-2017 | Will Jones | Ospreys | Wales | 03-Dec-1998 | 18(343) |
| 17-Nov-2017 | Josh Reynolds | Gwent Dragons | Wales | 01-Dec-1998 | 18(352) |
| 04-Nov-2017 | Carwyn Penny | Gloucester | England | 17-Nov-1998 | 18(353) |
| 27-Jan-2018 |  Marcus Street | Exeter Chiefs | England | 06-Feb-1999 | 18(356) |
| 27-Jan-2018 | Ryan Conbeer | Scarlets | Wales | 05-Feb-1999 | 18(357) |
| 12-Nov-2017 | Alex Hearle | Worcester Warriors | England | 08-Nov-1998 | 19(4) |
| 27-Jan-2018 | James Seabrook | London Wasps | England | 15-Jan-1999 | 19(12) |
| 02-Feb-2018 | Scott Lloyd | Scarlets | Wales | 14-Jan-1999 | 19(19) |
| 17-Nov-2017 | Dan Babos | Gwent Dragons | Wales | 17-Oct-1998 | 19(31) |
| 03-Nov-2017 | Sam Moore | Sale Sharks | England | 09-Sep-1998 | 19(55) |
| 27-Jan-2018 | Reuben Bird-Tulloch | Saracens | England | 28-Nov-1998 | 19(60) |
| 03-Nov-2017 | Beck Cutting | Worcester Warriors | England | 04-Sep-1998 | 19(60) |
| 17-Nov-2017 | Dan Davis | Scarlets | Wales | 17-Sep-1998 | 19(61) |
| 11-Nov-2017 | Ben Loader | London Irish | England | 08-Sep-1998 | 19(64) |
| 10-Nov-2017 | Morgan Morris | Ospreys | Wales | 28-Aug-1998 | 19(74) |
| 03-Feb-2018 | Sean Reffell | Saracens | England | 04-Nov-1998 | 19(91) |
| 02-Feb-2018 | Lewis Ellis-Jones | Scarlets | Wales | 27-Oct-1998 | 19(98) |
| 10-Nov-2017 | Jacob Umaga | London Wasps | England | 08-Jul-1998 | 19(125) |
| 11-Nov-2017 | Dane Blacker | Cardiff Blues | Wales | 06-Jul-1998 | 19(128) |
| 03-Nov-2017 | Ben Curry | Sale Sharks | England | 15-Jun-1998 | 19(141) |
| 02-Feb-2018 | Miles Reid | Bath | England | 05-Sep-1998 | 19(150) |
| 04-Nov-2017 | Gabriel Oghre | London Wasps | England | 24-May-1998 | 19(164) |
| 10-Nov-2017 | Ben White | Leicester Tigers | Scotland | 27-May-1998 | 19(167) |
| 27-Jan-2018 | Alun Lawrence | Cardiff Blues | Wales | 12-Aug-1998 | 19(168) |
| 04-Nov-2017 | Samuel Lewis | Leicester Tigers | England | 27-Apr-1998 | 19(191) |
| 03-Nov-2017 | Will Butler | Worcester Warriors | England | 17-Apr-1998 | 19(200) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).